QA1 offers bolt-in Rear Coil-Over Conversion Kits for 1964-1972 GM A-body vehicles. These kits include specially designed USA made mounting brackets and single or double adjustable aluminum shocks, high travel springs and all necessary hardware. Single adjustable shocks provide 18 positions of simultaneous rebound and compression adjustment while QA1's double adjustable shocks provide 18 positions of compression adjustment and 18 positions of rebound adjustment, for a total of 324 possible valving combinations. These shocks also utilize a fully threaded body allowing for ride height adjustability. Multiple spring rate options are also available, and have been successfully tested in various applications, from casual street driving to hard core race applications. With our highly popular adjustable front coil-over kits and the addition of the rear coil-over conversion kit, you can now get a complete suspension makeover for both ends of the vehicle. These lightweight billet aluminum coil-over shocks are made in the USA and offer easy, bolt-in installation and ride height adjustability. They are 100% dyno tested and serialized and serviceable and rebuildable by QA1 authorized service centers. Used in drag racing, street performance, autocross, road racing and street rod applications. Conversion Kit Note: Later model vehicles tend to weigh more on average. Please take this into account when ordering springs.

• Ultimate balance of ride quality and performance handling with adjustable rebound and compression valving.
• Achieve 1/2 higher than stock down to 2.25" lower than stock.
• Limited Lifetime Warranty for peace of mind.
• Proudly made in the USA.
• Sold as a pair.

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Product Overview Ditch those clunky leaf springs and take control of your F-body with QA1's coilovers and triangulated 4-link. This upgrade improves ride quality, enhances handling performance, and enables you to dial in the perfect stance. With the added benefit of accommodating wider wheels and tires, this kit is the ideal solution for your car. Achieve the Perfect Stance. Leaf springs limit your ability to achieve the perfect stance on your Camaro or Firebird. Upgrading to QA1's coilovers and a tubular 4-link provides +2 to -3 inches of ride height adjustability, letting you dial in exactly the look you want. Fit Wider Wheels & Tires Designed to work with both standard and mini-tubs, this system offers generous clearance for up to 11-inch-wide wheels on '67-'68 F-bodies and 12-inch-wide wheels and 335 tires on your 69. This results in a significantly more aggressive stance and improved traction and performance. Note: Achieving maximum wheel and tire width will require mini tubs. Ultimate Handling and Stability From twisty back roads to competitive track days, QA1's 4-link design with MOD Series shocks is the perfect solution for your F-body. 4-way adjustable valving offers independent tunability of both high and low speed compression and rebound. Easy, Installation & Adjustment Thoughtful design meets effortless installation requiring minimal welding. You'll experience a painless installation and setup process, where adjusting ride height, pinion angle, or wheelbase is as simple as a few tweaks – no link removal required. No modifications to floor pan required. Note – Welding required Made in the USA QA1 suspension is proudly made in Lakeville, Minnesota. Fitment Notes Wheel and tire fitment should be verified on the vehicle Welding Required Includes Spanner Wrench QA1 Subframe Connectors strongly recommended May require Exhaust Modification

• Enhance handling and stability
• Dial in the perfect stance
• Fit wider wheels and tires
• Best-in-class warranty
• Improve ride quality
• Made in the USA

This Part Fits:

Product Overview Ditch those clunky leaf springs and take control of your X-Body with QA1's coilovers and triangulated 4-link. This upgrade improves ride quality, enhances handling performance, and enables you to dial in the perfect stance. With the added benefit of accommodating wider wheels and tires, this kit is the ideal solution for your car. Achieve the Perfect Stance Leaf springs limit your ability to achieve the perfect stance on your Nova. Upgrading to QA1's coilovers and a tubular 4-link provides +2 to -3 inches of ride height adjustability, letting you dial in exactly the look you want. Fit Wider Wheels & Tires Designed to work with both standard and mini-tubs, this system offers generous clearance for up to 11-inch-wide wheels and 315mm tires. This results in a significantly more aggressive stance and improved traction and performance. Note: Achieving maximum wheel and tire width will require mini tubs. Improved Handling and Stability QA1 4-link delivers handling control without compromising your daily comfort. Perfect for both street and track use, double adjustable shocks are famous for their independent rebound and compression tunability, giving you exceptional handling and control and finer control over your suspension. Easy, Installation & Adjustment Thoughtful design meets effortless installation requiring minimal welding. You'll experience a painless installation and setup process, where adjusting ride height, pinion angle, or wheelbase is as simple as a few tweaks – no link removal required. No modifications to floor pan required. Note – Welding required Best In-Class Lifetime Warranty Register at QA1.net/warranty for lifetime coverage of your QA1 shocks. Made in the USA QA1 suspension is proudly made in Lakeville, Minnesota. Fitment Notes Wheel and tire fitment should be verified on the vehicle Welding Required Includes Spanner Wrench QA1 Subframe Connectors strongly recommended May require exhaust modification

• Accommodates wider wheels and tires (up to 11-inch-wide wheels and 315mm tires) for an aggressive stance.
• Improves ride quality and handling performance with advanced coilovers and a 4-link suspension.
• Easy installation and adjustment with minimal welding and no floor pan modifications required.
• Adjustable ride height for dialing in the perfect stance (+2 to -3 inches).
• Made in the USA with a best-in-class lifetime warranty for QA1 shocks.

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Product Overview Ditch those clunky leaf springs and take control of your F-body with QA1's coilovers and triangulated 4-link. This upgrade improves ride quality, enhances handling performance, and enables you to dial in the perfect stance. With the added benefit of accommodating wider wheels and tires, this kit is the ideal solution for your car. Achieve the Perfect Stance. Leaf springs limit your ability to achieve the perfect stance on your Camaro or Firebird. Upgrading to QA1's coilovers and a tubular 4-link provides +2 to -3 inches of ride height adjustability, letting you dial in exactly the look you want. Fit Wider Wheels & Tires Designed to work with both standard and mini-tubs, this system offers generous clearance for up to 11-inch-wide wheels on 67-68 F-bodies and 12-inch-wide wheels and 335 tires on your 69. This results in a significantly more aggressive stance and improved traction and performance. Note: Achieving maximum wheel and tire width will require mini tubs. Improved Handling and Stability QA1 4-link delivers handling control without compromising your daily comfort. Perfect for both street and track use, double adjustable shocks are famous for their independent rebound and compression tunability, giving you exceptional handling and control and finer control over your suspension. Easy, Installation & Adjustment Thoughtful design meets effortless installation requiring minimal welding. You'll experience a painless installation and setup process, where adjusting ride height, pinion angle, or wheelbase is as simple as a few tweaks – no link removal required. No modifications to floor pan required. Note – Welding required Best In-Class Lifetime Warranty Register at QA1.net/warranty for lifetime coverage of your QA1 shocks. Made in the USA Fitment Notes Wheel and tire fitment should be verified on the vehicle Welding Required Includes Spanner Wrench QA1 Subframe Connectors strongly recommended May require exhaust modification

• Enhance handling and stability
• Dial in the perfect stance
• Fit wider wheels and tires
• Best-in-class warranty
• Improve ride quality
• Made in the USA

This Part Fits:

Convert your classic Dodge Charger, Dodge Coronet, and and Plymouth Belvedere from leaf spring rear suspension to a QA1 coil-over kit that uses a triangulated 4 link design. This is the best way to gain a more planted feel, make room for larger wheels and tires and correct the wheelbase of classic Mopars. The kit allows you to run a 3" bumper exit exhaust. This modern design instantly delivers a more modern driving experience on the street while giving you the adjustability to maximize performance at the autocross, road course and drag strip. QA1 Mopar rear suspension systems come complete with powder-coated tubular components-including the cross member, upper trailing arms and lower trailing arms-and all installation necessary hardware. Kits work with popular rear axles including Mopar 8 3/4", Ford 9" and Dana 60 rear ends. Choose the appropriate part number when selecting your kit. Each system includes your choice of single-adjustable, double-adjustable or MOD Series shocks. All of the coil-over options give you the ability to fine tune ride and handling characteristics. You can also easily adjust the ride height to achieve the look and performance you want. QA1 coil-over rear suspension systems can be paired with an optional QA1 sway bar to further enhance handling characteristics and prevent body roll during hard launches. QA1 systems are made in the USA. Single- and double-adjustable shocks are eligible for an industry-leading Limited Lifetime Warranty. Fitment notes: Installation requires a small amount of cutting and welding on the frame and axle housing. This kit works with factory-located leaf spring mounts or modified inboard-located leaf spring mounts. Single-adjustable shocks are recommended for cars used primarily on the street. Double-adjustable coil-overs are recommended for cars that will consistently be used for drag racing, autocross or road racing. MOD Series shocks are recommended for drivers who want maximum performance out of their vehicle.

• QA1 uniquely engineered to enhance the performance of your vehicle
• Adjustable shock valving options for all driving styles
• Ride height adjustability
• Best-in-class warranty
• Easy bolt-in install
• Made in the USA

This Part Fits:

With this all-new, engineered-from-scratch rear system, 1973-1987 C10 owners can add modern performance to a pickup that was designed for utility-all without removing the bed of the truck. QA1 engineered a unique bolt-in torque arm design that maximizes performance without the inherent binding issues of other 4-link systems. This provides superior control over suspension movement, resulting in a smooth ride and great handling characteristics. Dialing in the stance will be easy with the adjustable coil-over system ? 4" to 7" of adjustment below stock can easily be achieved. Pair this rear system with QA1's front system to have ride height adjustability on all four corners, giving you that perfect level stance. Everything you need is included, all the way down to the hardware. All components included in these systems are proudly made in QA1's Lakeville, Minnesota facility. All QA1 shocks are 100% dyno tested and serialized.

• QA1 uniquely engineered to enhance the performance of your vehicle
• Adjustable shock valving options for all driving styles
• Ride height adjustability
• Best-in-class warranty
• Easy bolt-in install
• Made in the USA

This Part Fits:

QA1's C10 bolt-on rear suspension system is designed to convert trucks originally equipped with a coil-spring rear suspension to coil-overs. This system offers up to 6" of total drop and integrates adjustability into multiple areas so you can truly fine-tune the geometry to create the perfect performance after lowering. , , By converting the coil-spring rear suspension to adjustable coil-overs, the ride height for each corner can be altered for that perfect stance. From there, the tubular steel truck arms feature an integrated pinion angle adjustment, eliminating the need for angled shims and allowing the wheelbase to be set to exact specifications. The adjustable panhard bar keeps the rear centered for more predictable cornering, and the multiple mounting locations correct roll center geometry based on the amount of drop. The coil-overs are also relocated to the outside of the frame rail, closer to the wheel, for better cornering stability and allowing room for popular aftermarket rear-mounted fuel tanks. In addition to being easily bolted on, the entire rear system can be installed without needing to remove the bed of the truck.

• QA1 uniquely engineered to enhance the performance of your vehicle
• Adjustable shock valving options for all driving styles
• Ride height adjustability
• Best-in-class warranty
• Easy bolt-in install
• Made in the USA

This Part Fits:

QA1's C10 bolt-on rear suspension system is designed to convert trucks originally equipped with a coil-spring rear suspension to coil-overs. This system offers up to 6" of total drop and integrates adjustability into multiple areas so you can truly fine-tune the geometry to create the perfect performance after lowering. , , By converting the coil-spring rear suspension to adjustable coil-overs, the ride height for each corner can be altered for that perfect stance. From there, the tubular steel truck arms feature an integrated pinion angle adjustment, eliminating the need for angled shims and allowing the wheelbase to be set to exact specifications. The adjustable panhard bar keeps the rear centered for more predictable cornering, and the multiple mounting locations correct roll center geometry based on the amount of drop. The coil-overs are also relocated to the outside of the frame rail, closer to the wheel, for better cornering stability and allowing room for popular aftermarket rear-mounted fuel tanks. In addition to being easily bolted on, the entire rear system can be installed without needing to remove the bed of the truck.

• QA1 uniquely engineered to enhance the performance of your vehicle
• Adjustable shock valving options for all driving styles
• Ride height adjustability
• Best-in-class warranty
• Easy bolt-in install
• Made in the USA

This Part Fits:

Product Overview Ditch those clunky leaf springs and take control of your 1971-1981 2nd Gen F-body with QA1's coilovers and triangulated 4-link. This upgrade improves ride quality, enhances handling performance, and enables you to dial in the perfect stance. With the added benefit of accommodating wider wheels and tires, this kit is the ideal solution for your car. Achieve a Lowered, more Aggressive Stance Leaf springs limit your ability to achieve the perfect stance and require modifications to tune ride height. Give your Camaro or Firebird a sleek, aggressive, lowered look with QA1's tubular 4-link. This kit provides an optimized ride height that improves handling, roll center, and center of gravity. QA1 coilovers offer height adjustability that can be dialed in with ease. Fit Wider Wheels & Tires Designed to work with both standard and mini-tubs, this system offers generous clearance for up to 12-inch-wide wheels and 335 tires. This results in a significantly more aggressive stance and improved traction and performance. Note: Achieving maximum wheel and tire width will require mini tubs. Improved Handling and Stability QA1 4-link delivers handling control without compromising your daily comfort. Single-adjustable Proma Star shocks let you fine-tune the ride, effortlessly switching between smooth cruising and a firmer, more aggressive feel. Easy, Installation & Adjustment Thoughtful design meets effortless installation requiring minimal welding. You'll experience a painless install and setup process, where adjusting ride height, pinion angle, or wheelbase is as simple as a few tweaks. Fitment Notes Typical ride height range from axle centerline to fender arch is 10.75 to 12 for Camaros, and 13.75 to 15 on Firebirds. Wheel and tire fitment should be verified on the vehicle. Exhaust modification required. Will not work with over the axle exhaust. Welding Required. Includes Spanner Wrench. QA1 Subframe Connectors strongly recommended.

• Enhance handling and stability
• Dial in the perfect stance
• Fit wider wheels and tires
• Best-in-class warranty
• Improve ride quality
• Made in the USA

This Part Fits:

Add modern performance to a pickup that was designed for utility ? all without removing the bed of the truck. QA1 engineered a unique design offering 4" to 7" drop that maximizes performance without the inherent binding issues of other 4-link systems. With superior control over suspension movement, you can easily dial in the stance for a smooth ride and great handling characteristics. The systems come with unprecedented adjustability: the panhard bar, torque arm, trailing arms, bracket mounts, and shocks are all adjustable, and they are truly independent of each other, so you don?t have to worry about one adjustment affecting another. Easily bolt in this system ? no welding required. Everything needed is included, all the way down to the hardware. All components in these systems are proudly made in QA1?s Lakeville, Minnesota facility. All QA1 shocks are 100% dyno tested and serialized.

• QA1 uniquely engineered to enhance the performance of your vehicle
• Adjustable shock valving options for all driving styles
• Ride height adjustability
• Best-in-class warranty
• Easy bolt-in install
• Made in the USA

This Part Fits:

With this all-new, engineered-from-scratch rear system, 1973-1987 C10 owners can add modern performance to a pickup that was designed for utility-all without removing the bed of the truck. QA1 engineered a unique bolt-in torque arm design that maximizes performance without the inherent binding issues of other 4-link systems. This provides superior control over suspension movement, resulting in a smooth ride and great handling characteristics. Dialing in the stance will be easy with the adjustable coil-over system ? 4" to 7" of adjustment below stock can easily be achieved. Pair this rear system with QA1's front system to have ride height adjustability on all four corners, giving you that perfect level stance. Everything you need is included, all the way down to the hardware. All components included in these systems are proudly made in QA1's Lakeville, Minnesota facility. All QA1 shocks are 100% dyno tested and serialized.

• QA1 uniquely engineered to enhance the performance of your vehicle
• Adjustable shock valving options for all driving styles
• Ride height adjustability
• Best-in-class warranty
• Easy bolt-in install
• Made in the USA

This Part Fits:

For the rear of 65-72 F-100s, QA1 engineered a unique torque arm design that maximizes performance without the inherent binding issues of other systems, all while achieving a 4" to 7" drop. This bolt-in system also offers unprecedented adjustability: the panhard bar, torque arm, trailing arms, bracket mounts, and shocks are all adjustable, and they are truly independent of each other, so your customers don't have to worry about one adjustment affecting another. Everything you need is included, all the way down to the hardware. All components included in these systems are proudly made in QA1's Lakeville, Minnesota facility. All QA1 shocks are 100% dyno tested and serialized.

• QA1 uniquely engineered to enhance the performance of your vehicle
• Adjustable shock valving options for all driving styles
• Ride height adjustability
• Best-in-class warranty
• Easy bolt-in install
• Made in the USA

This Part Fits:

QA1's C10 bolt-on rear suspension system is designed to convert trucks originally equipped with a coil-spring rear suspension to coil-overs. This system offers up to 6" of total drop and integrates adjustability into multiple areas so you can truly fine-tune the geometry to create the perfect performance after lowering. , , By converting the coil-spring rear suspension to adjustable coil-overs, the ride height for each corner can be altered for that perfect stance. From there, the tubular steel truck arms feature an integrated pinion angle adjustment, eliminating the need for angled shims and allowing the wheelbase to be set to exact specifications. The adjustable panhard bar keeps the rear centered for more predictable cornering, and the multiple mounting locations correct roll center geometry based on the amount of drop. The coil-overs are also relocated to the outside of the frame rail, closer to the wheel, for better cornering stability and allowing room for popular aftermarket rear-mounted fuel tanks. In addition to being easily bolted on, the entire rear system can be installed without needing to remove the bed of the truck.

• QA1 uniquely engineered to enhance the performance of your vehicle
• Adjustable shock valving options for all driving styles
• Ride height adjustability
• Best-in-class warranty
• Easy bolt-in install
• Made in the USA

This Part Fits:

QA1's Injection Molded Carbon Steel rod ends are generally appropriate for low load, moderate oscillation applications. These PTFE Nylon 12 reinforced rod ends are protective coated for corrosion resistance and are available with left and right hand threads. This series features a molded race compound designed to provide low friction, low moisture absorbing properties and high wear resistance. QA1's Injection Molded Series design is unique in the industry since no holes need to be drilled in the rod end body, thereby allowing the rod end to maintain its full strength and integrity. The ball is made from 52100 bearing steel that has been heat treated, hard chrome plated and precision ground. The race is made from reinforced nylon 12 with PFTE, and the body is carbon steel that is protective coated. Notes: Stud configurations are available.

• Guaranteed strength, durability and quality champions demand
• Rod ends for every motorsport need
• Precise tolerances

QA1's Injection Molded Carbon Steel rod ends are generally appropriate for low load, moderate oscillation applications. These PTFE Nylon 12 reinforced rod ends are protective coated for corrosion resistance and are available with left and right hand threads. This series features a molded race compound designed to provide low friction, low moisture absorbing properties and high wear resistance. QA1's Injection Molded Series design is unique in the industry since no holes need to be drilled in the rod end body, thereby allowing the rod end to maintain its full strength and integrity. The ball is made from 52100 bearing steel that has been heat treated, hard chrome plated and precision ground. The race is made from reinforced nylon 12 with PFTE, and the body is carbon steel that is protective coated. Notes: Stud configurations are available.

• Guaranteed strength, durability and quality champions demand
• Rod ends for every motorsport need
• Precise tolerances

For the ultimate in performance rod ends, look no further than QA1's MXM Chromoly Steel Series male rod ends. These metric heavy duty rod ends are commonly used on 4-link and ladder bars for their strength and durability. MXM Series rod ends are completely self-sealing and self-lubricating because of their Nylon/PTFE injection molded race that keeps dirt and debris out. The ball is made from 52100 bearing steel that has been heat treated, hard chrome plated and precision ground. The PTFE race is self-lubricating and self-sealing, and the body is made from chromoly steel that has been heat treated and protective coated for corrosion resistance. Features metal to metal support for heavy shock loads and increased cross-sectional thickness for greater tensile strength.

• Guaranteed strength, durability and quality champions demand
• Rod ends for every motorsport need
• Precise tolerances

QA1's bolt-in K-members allow owners of 1994-2004 Mustangs to use the engine of their choice while enjoying the significant weight savings, increased header clearance, and improved geometry of a QA1 K-member. Made from high-quality American-made HSLA steel, this tubular design is over 50% lighter than the stock K-member, weighing only 25 lbs! Ideal for street performance, autocross, Pro-Touring or drag racing, these K-members maintain optimum anti-dive geometry and minimize bump steer issues on Mustangs with a lowered stance. And because they retain the factory wheel base, these K-members easily bolt on to factory components without any wheel or tire fitment changes. Bolt-in engine mounts sold separately. For best results, QA1 control arms are strongly recommended.

• Enhance performance & reduce weight
• Multiple engine mounting options
• Maintain factory track width
• Increase header clearance
• Enhanced geometry
• Made in the USA

This Part Fits:

QA1's bolt-in K-members allow owners of 1979-1993 Mustangs to use the engine of their choice while enjoying the significant weight savings, increased header clearance, and improved geometry of a QA1 K-member. Made from high-quality American-made HSLA steel, this tubular design is over 50% lighter than the stock K-member, weighing only 25 lbs! Ideal for street performance, autocross, Pro-Touring or drag racing, these K-members maintain optimum anti-dive geometry and minimize bump steer issues on Mustangs with a lowered stance. And because they retain the factory wheel base, these K-members easily bolt on to factory components without any wheel or tire fitment changes. Bolt-in engine mounts sold separately. For best results, QA1 control arms are strongly recommended.

• Enhance performance & reduce weight
• Multiple engine mounting options
• Maintain factory track width
• Increase header clearance
• Enhanced geometry
• Made in the USA

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QA1's Heavy Duty Coil-over brackets are the perfect solution to add coilovers to your car or truck. Specifically designed for heavier vehicles, our kit includes all the necessary hardware and bracketry for a seamless installation. With double shear bracketry it ensures the strength and support you need for street and race applications. This simple weld-on kit features axle mount brackets and upper shock mounting tabs. When paired with QA1 coil-over shocks and springs, you have a perfect coil-over solution for your custom application's needs. Our axle-mounted brackets offer 9" of total height adjustment, in 3/4" incriments, giving you full control for your desired stance. This kit is a universal weld-in kit designed for 3.00" diameter axle tubes.

• Perfect solution for adding coilovers to your vehicle
• 9in. of height adjustment
• Double shear bracketry
• For 3" diameter axles
• Made in the USA

QA1 has a complete adjustable shock mount kit available that makes it easy to convert one shock length to another. For all QA1 drag racing, street performance and street rod adjustable shocks.

• DIY universal shock mount
• For 3in. axle tubes
• Made in the USA
• Steel

QA1 Pro Coil Systems for 2003-2011 Crown Victorias are a great option for anyone looking for fully adjustable ride height and valving control. Choose a spring rate and adjustability that fits your driving style, adjust the valving to match, and you are on your way. These shocks also utilize a fully threaded body that allows you to adjust your ride height for the perfect stance or to finely tune the weight balance for superior handling. QA1 Item number MS431-09650

• Serviceable and Rebuildable by QA1 Authorized Service Centers
• Lightweight Billet Aluminum Coil-Over Shocks
• 100% Dyno Tested and Serialized
• QA1 Item number MS431-09650
• Easy, bolt-In Installation
• Ride Height Adjustable
• Made in the USA

This Part Fits:

QA1 Pro Coil Systems for 2003-2011 Crown Victorias are a great option for anyone looking for fully adjustable ride height and valving control. Choose a spring rate and adjustability that fits your driving style, adjust the valving to match, and you are on your way. These shocks also utilize a fully threaded body that allows you to adjust your ride height for the perfect stance or to finely tune the weight balance for superior handling. QA1 Item number MS431-09550

• Serviceable and Rebuildable by QA1 Authorized Service Centers
• Lightweight Billet Aluminum Coil-Over Shocks
• 100% Dyno Tested and Serialized
• QA1 Item number MS431-09550
• Easy, bolt-In Installation
• Ride Height Adjustable
• Made in the USA

This Part Fits:

QA1 Pro Coil Systems for 2003-2011 Crown Victorias are a great option for anyone looking for fully adjustable ride height and valving control. Choose a spring rate and adjustability that fits your driving style, adjust the valving to match, and you are on your way. These shocks also utilize a fully threaded body that allows you to adjust your ride height for the perfect stance or to finely tune the weight balance for superior handling. QA1 Item number MS431-09450

• Serviceable and Rebuildable by QA1 Authorized Service Centers
• Lightweight Billet Aluminum Coil-Over Shocks
• 100% Dyno Tested and Serialized
• QA1 Item number MS431-09450
• Easy, bolt-In Installation
• Ride Height Adjustable
• Made in the USA

This Part Fits:

Upgrade your 1967–1973 Mustang’s suspension with QA1’s Pro Coil System. This single adjustable coilover kit combines modern handling, ride quality, and stance adjustability in an easy bolt-in package. Featuring 10” coil springs with a 450 lb./in. rate, it’s the firmest single adjustable option available, delivering sharper cornering and reduced body roll for aggressive street performance and restomod builds. MODERN HANDLING & ADJUSTABILITY With QA1’s single adjustable coilovers, you can fine-tune rebound and compression together with 18 settings of adjustment. One knob makes it simple to soften the ride for cruising or firm it up for maximum handling response. RIDE HEIGHT FLEXIBILITY This system allows you to adjust ride height from factory stock height down to 2” lower, giving you flexibility to fine-tune stance, handling balance, and wheel/tire clearance while maintaining proper geometry. EASY BOLT-IN INSTALLATION No cutting or welding required. QA1 designed this kit as a direct bolt-in upgrade for classic Mustangs, making it a DIY-friendly option that delivers modern suspension performance with minimal effort.

• Single adjustable shocks with 18 settings of rebound/compression control
• Works seamlessly with QA1 tubular control arms and sway bars
• Includes 10” coil springs with a 450 lb./in. spring rate
• Application-specific fit for 1967–1973 Ford Mustangs
• Direct bolt-in installation — no welding required
• Durable powder-coated springs and premium hardware
• Ride height adjustable: factory to –2”

This Part Fits:

Modernize your 1967–1973 Mustang’s suspension with QA1’s Pro Coil System. This single adjustable coilover kit combines ride quality, performance handling, and stance adjustability in an easy bolt-in package. Featuring a 10” coil spring with a 400 lb./in. rate, it’s the perfect solution for street performance and restomod builds that demand sharper handling with a comfortable ride. MODERN HANDLING & ADJUSTABILITY QA1 single adjustable coilovers allow you to fine-tune rebound and compression together with 18 settings of adjustment. With a simple turn of the knob, you can soften the ride for cruising or firm it up for aggressive driving. RIDE HEIGHT FLEXIBILITY This system lets you adjust ride height from factory stock height down to 2” lower, giving you control over stance, wheel/tire fitment, and handling balance without sacrificing suspension geometry. EASY BOLT-IN INSTALLATION No welding, cutting, or major modifications. QA1 designed this kit as a direct bolt-in upgrade for classic Mustangs, making it an easy DIY-friendly installation.

• Complements QA1 tubular control arms and sway bars for a complete suspension solution
• Single adjustable shocks with 18 settings of rebound/compression control
• Includes 10” coil springs with a 400 lb./in. spring rate
• Application-specific fit for 1967–1973 Ford Mustangs
• Durable powder-coated springs and premium hardware
• Easy bolt-in installation - no welding required
• Adjustable ride height: factory to –2”

This Part Fits:

Upgrade your classic Mustang’s front suspension with QA1’s Pro Coil System. Designed specifically for 1964 - 1966 Mustangs, this single adjustable coilover kit delivers modern handling, ride quality, and stance adjustability in an easy-to-install package. Featuring a 10” spring with a 350 lb./in. rate, it’s the perfect solution for street performance or restomod builds that demand both comfort and control. MODERN HANDLING & ADJUSTABILITY Factory suspension setups limit tuning and performance. With QA1’s single adjustable coilovers, you can dial in rebound and compression with a simple turn of the knob, letting you fine-tune ride quality and handling for daily driving or spirited performance. RIDE HEIGHT FLEXIBILITY This system allows you to adjust ride height from factory stock height down to 2” lower. Whether you want to maintain an original look or achieve a more aggressive stance, QA1 Pro Coils let you fine-tune without sacrificing geometry or drivability. EASY BOLT-IN INSTALLATION No cutting, welding, or fabrication required. QA1’s Pro Coil System is designed for straightforward installation with basic tools, with either factory, or QA1 tubular control arms.

• Single adjustable shocks with 18 settings of rebound/compression control
• Includes 10” coil springs with a 350 lb./in. spring rate
• Powder-coated springs and premium hardware for durability
• Bolt-in installation - no major modifications required
• Application-specific fit for 1964 -1966 Ford Mustangs
• Works seamlessly with QA1 control arms and sway bars
• Adjustable ride height: factory to –2”

This Part Fits:

Convert your Corvette?s leaf spring suspension to QA1?s MOD Series coil-over shocks to maximize handling performance, suspension tunability and ride height adjustment for the perfect stance. These 4-way adjustable Corvette coil-overs are perfect for pushing your car to the limit at the track then setting the valving for comfortable street use. Designed to meet the demands of top-tier pro touring and track cars that require more aggressive force curves, MOD Series shocks utilize modular valve packs. This allows you to change valving without removing the shocks from the car or exposing the shock oil to contamination. Additionally, low-speed bleed adjustability helps you further refine weight transfer and low-speed valving characteristics in any conditions. The nitrogen-charged piggyback canister delivers optimal performance while fitting within the tight confines of stock Corvette suspension geometry. Does not require the use of a to link relocation kit. Adjust your car?s ride height to improve its handling, lower the center of gravity and corner balance your car for maximum performance. You can lower both base model cars (1" to 2" of drop) and Z06 models (.5" to 1.5" of drop). QA1?s bolt-in coil-overs are easy to install with basic hand tools and use factory mounting locations. They are available with multiple spring rate options to help you find the perfect rate for your intended use. The medium springs offer great street-ability for cars that will mostly be used on the road. The firm option is geared toward track-oriented cars, further reducing body roll under hard cornering and providing a more planted feel. , , Installation notes: , , Models with electronic ride control require Real Time Damping simulators. , , Does not require the use of a toe link relocation kit.

• Valve packs shock can quickly and easily be revalved without interrupting the oil path or opening the shock up for debris and air contamination
• QuickTune Technology: dry modular valve packs that can easily be swapped out
• Remote or piggyback canister mounting options
• 4-way adjustable high and low speed bleed
• 100% dyno tested and serialized
• Made in the USA

This Part Fits:

soft or firm compression and rebound valve packs also available. Once the desired valving is in place, the unique double adjustable design, with adjustable low-speed bleed, allows for fully independent control over the compression and rebound characteristics. With all these adjustability options, the MOD Series shock achieves an expansive force curve capability and an unprecedented level of tunability. The shock also features mounting adjustability to accommodate a variety of vehicles and mounting configurations. The nitrogen-charged canister is available in a piggyback or remote configuration for ease of installation in tight areas, and the base eyelet is indexable, so you can unbolt it and reattach it at the angle you need for the best shock and canister placement. Like all QA1 shocks, the MOD Series shock is 100% dyno tested and serialized and proudly made in QA1's Lakeville, Minnesota facility.

• Valve packs shock can quickly and easily be revalved without interrupting the oil path or opening the shock up for debris and air contamination
• QuickTune Technology: dry modular valve packs that can easily be swapped out
• Remote or piggyback canister mounting options
• 4-way adjustable high and low speed bleed
• 100% dyno tested and serialized
• Made in the USA

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Bring modern suspension technology to your classic Mustang with QA1’s Front Pro Coil System. Designed for 1967–1973 Mustangs, this double adjustable coilover kit delivers unmatched handling, ride quality, and stance control. Featuring 10” coil springs with a 400 lb./in. rate, it provides the ideal balance for performance street cars and restomod builds, giving you precision tuning for both comfort and control. PRECISION HANDLING & ADJUSTABILITY QA1’s double adjustable coilovers feature independent rebound and compression controls with 18 clicks each. This allows you to fine-tune your Mustang’s ride and handling for daily driving, spirited cruising, or track use - giving you total control over how your car feels on the road. RIDE HEIGHT FLEXIBILITY Dial in your stance with ride height adjustability from factory stock height down to 2” lower. Perfect for achieving the aggressive look you want while maintaining suspension geometry and drivability. EASY BOLT-IN INSTALLATION No welding or cutting is required. The QA1 Pro Coil System is engineered as a direct bolt-in upgrade, making installation simple with basic tools while delivering professional-level results.

• Double adjustable shocks with 18 rebound and 18 compression settings
• Works seamlessly with QA1 tubular control arms and sway bars
• Includes 10” coil springs with a 400 lb./in. spring rate
• Premium hardware and powder-coated springs for durability
• Application-specific fit for 1967–1973 Ford Mustangs
• Easy bolt-in installation - no welding required
• Ride height adjustable: factory to –2”

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For an economical traditional metric spherical bearing, QA1's MCOM and MCOM-T Series is the perfect choice. Each bearing is made from chromoly steel with an optional self-lubricating PTFE liner. BALL, 52100 Bearing Steel, Heat Treated, Hard Chrome Plated, Precision Ground, , LINER (COM-T), PTFE, Self-Lubricating, , RACE, Chromoly Steel (Mfr.'s Option - Stainless Steel), Heat Treated, Protective Coated for Corrosion Resistance.

• Huge selection of inch and metric sizes
• Wide selection for a variety of uses
• Available in chromoly or stainless